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Portal:Geography

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Introduction

Physical map of Earth with political borders as of 2016
Geography (from Greek γεωγραφία, geographia, literally "earth description") is a field of science devoted to the study of the lands, the features, the inhabitants, and the phenomena of Earth. The first person to use the word "γεωγραφία" was Eratosthenes (276–194 BC). Geography is an all-encompassing discipline that seeks an understanding of the Earth and its human and natural complexities—not merely where objects are, but how they have changed and come to be.

Geography is often defined in terms of the two branches of human geography and physical geography. Human geography deals with the study of people and their communities, cultures, economies and interactions with the environment by studying their relations with and across space and place. Physical geography deals with the study of processes and patterns in the natural environment like the atmosphere, hydrosphere, biosphere, and geosphere.

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Yellowstone National Park
Yellowstone National Park is a national park located in the U.S. states of Wyoming, Montana, and Idaho. Yellowstone, widely held to be the first national park in the world, was established in 1872 by the United States Congress and is known for its wildlife and its many geothermal features, especially Old Faithful Geyser, one of the most popular features in the park. It has many types of ecosystems, but the subalpine forest is dominant. Yellowstone National Park spans an area of 3,468.4 square miles (8,983 km2), comprising lakes, canyons, rivers, and mountain ranges. Yellowstone Lake is one of the largest high-altitude lakes in North America and is centered over the Yellowstone Caldera, the largest supervolcano on the continent. The caldera is considered an active volcano, it has erupted with tremendous force several times in the last two million years. Half of the world's geothermal features are in Yellowstone, fueled by this ongoing volcanism. Hundreds of species of mammals, birds, fish and reptiles have been documented, including several that are either endangered or threatened, the vast forests and grasslands also include unique species of plants. Yellowstone Park is the largest and most famous megafauna location in the continental United States.

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Alfred Russel Wallace was a British naturalist, explorer, geographer, anthropologist, and biologist. He is best known for independently proposing a theory of natural selection which prompted Charles Darwin to publish on his own theory. Wallace did extensive fieldwork, first in the Amazon River basin and then in the Malay Archipelago, where he identified the Wallace Line that divides Indonesia into two distinct parts, one with animals more closely related to those of Australia and the other with animals more closely related to those found in Asia. He was considered the 19th century's leading expert on the geographical distribution of animal species and is sometimes called the "father of biogeography". Wallace was one of the leading evolutionary thinkers of the 19th century who made a number of other contributions to the development of evolutionary theory besides being co-discoverer of natural selection, these included the concept of warning colouration in animals, and the Wallace effect, a hypothesis on how natural selection could contribute to speciation by encouraging the development of barriers against hybridization. An account of his observations, The Malay Archipelago, is regarded as probably the best of all journals of scientific exploration published during the 19th century.

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Laguna Beach, California
Credit: D Ramey Logan

An aerial view of Laguna Beach, a seaside resort city and artist community located in southern Orange County, California, US. The region was originally known to the Spanish as "La Cañada de Las Lagunas" which means "The Canyon of the Small Lakes", in reference to two lakes found near the head of Laguna Canyon.

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